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These pages reproduce public open data published by Luxembourg administrations and communes. They are informational: check the official source before acting on a date. Avuru Finance is read-only and can never initiate a payment.

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    Upcoming dates

    Tax deadlines in Luxembourg

    The dates below are the filing calendar published by the Administration des contributions directes. They are dates, not tax advice: your own situation can carry a different deadline.

    December 2026

    • Dec 31Deadline: 2025 income tax return (form 100)Tax deadlines
    • Dec 31Deadline: annual statement (décompte annuel) for 2025Tax deadlines

    Frequently asked questions

    Where do these deadlines come from?

    From the filing calendar published by the Administration des contributions directes. We copy the published dates and link back to them; we do not compute a deadline for you.

    Does the same deadline apply to everyone?

    No. The published deadline is the general one; extensions and different rules exist depending on your situation. Check with the administration or your adviser before relying on a date.

    Can I be reminded before the deadline?

    Add this calendar with the button at the top of the page. With an Avuru Finance account you can also switch on a reminder a day or two before each date.

    Luxembourg calendar